How much to tailor (create from scratch though) a shirt?

I'd like to get a few blouses made that copy these from a brand called Realisation Par as the real ones are a bit too much for me. How much would I be looking at? Obviously the reason I would want to get them made would be so they're cheaper!

As you don't have a pattern, the seamstress would have to design one, especially to fit you, make a mock-up, order the fabric, cut, sew, fit, finish and all for under $200. It may be worth it if you plan to have several made at the same time. Also, you would be asking someone to pirate an existing design.